Stopping mechanism for automatic replenishing-looms.



R. JAMIESON. STOPPING MECHANISM FOR AUTOMATIC REPLENISHING LOOMS.

APPLICATION I'ILEI) APR. 23, 1908. I

Patented Mar. 9, 1909.

2 SHEETS-SHEET 1.

jut/elder, 7 3056,

R. JAMIESON.

STOPPING MEUHANISM FOB AUTOMATIC REPLENISHING LOOMS.

APPLICATION IILED APR. 23, 1908.

91 4,49 1 y Patented Mar. 9, 1909.

2 SHEETS-SHEET 2.

1n: mamas PETERS CO4, WASHINGTON, n. c.

nrrnn srzrns a i omen ROBERT JAMIESON, OF HOPEDALE, MASSACHUSETTS,ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OFMAINE.

STOPPING IJZECI-IANISM FOR AUTOMATIC REPLENISHING-LOOMS.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed April 23, 1908. Serial No. 428,717.

To all whom it may concern:

Be it known that 1, ROBERT JAMmsoN, a citizen of the United States, andresident of Hopedale, county of Worcester, State of Massachusetts, haveinvented. an Improvement in Stopping Mechanism for AutomaticReplenishing-Looms, of which the following description, in connectionwith the accompanying drawing, is a specification, like numerals on thedrawing representing like p arts.

l t hen weaving certain kinds of cloth it is important that there shallbe no fanlty picks, that is, in which the filling is partly or whollyabsent, and when the loom is of the type in which the filling isreplenished automatically in the running shuttle means must be providedto so control the operation of the replenishing mechanism that after abreak the filling will be laid in the same pick of the cycle as that inwhich failure of the filling occurs.

My present invention has for its object the production of means for socontrolling the operation of the loom that when the filling breaks theloom will come to a stop with that shed of the cycle open correspondingto the shed in which the break occurred, such means being arranged in mypresent invention for three-harness work.

I have illustrated my invention in connection with a loom of theNorthrop type, such as is shown in United States Patent No. 529940,granted to Northrop November 27, 1894, the loom being equipped withfillingexhanstion-indicating mechanism and with two filling-detectors orforks, one at each side of the loom.

I have so arranged the apparatus that when either detector detectsfilling absence the loom will be stopped, with the shed open in whichthe filling absence was detected, neither detector having any controlover the replenishing mechanism but each detector arresting take-up.Filling-replenishment is eil' ected by or through the feeler orfillingexhaustion-indicating mechanism, so that there is nodiscontinuance of filling from that source and there is no arrest oftake-up when replenishment is effected.

Heretofore looms have been arranged with a feeler and double detectorsor forks, each detector acting to stop the loom, but so far as I amaware the pick-finding feature is not present, it being necessary forthe weaver to turn the loom over by hand to match the pick.

By my invention there is no necessity for matching the pick by hand asthe loom stops with the proper shed open and all the weaver has to do isto see that the loose end of filling is snitabl 1 held when the shuttleis sent through the shed upon starting up the loom.

Figure 1 is a top plan view, centrally broken out, of a sufficientportion of an automatic filling-replenishing feeler loom with oneembodiment of my present invention appled thereto; Fig. 2 is an enlargedside elevation of the filling detecting mechanism at the left-hand sideof the loom, with the various parts in normal position, the view beingtaken on the line 2-2, Fig. 1, looking toward the right; Fig. 3 is asimilar view, but showing the slide in its forward position, as sumedafter detection of filling absence by either detector; Fig. 4 shows thesame parts, but with the slide back and the parts in readinose to effectshipper release upon the next forward movement of the slide; Fig. 5 is adiagrammatic view showing the sequence of operations when fillingabsence is initially detected by the main or left-hand detector Fig. 6is a similar view, but showin the operations when the auxiliary orrightland detector intially detects filling absence.

The replenishing mechanism at the righthand side of the loom, includinga filling feeder or hopper 1 and a transferrer 2, (partly shown inFig. 1) are of well-known construction and operation, theautomatically-selfthreading shuttle 3 being shown in the shuttle-box 4at the left-hand side of the loom, which box is in practice arranged forthe entrance of the feeler 5 of the filling-exhaustion-indicatingmechanism, which latter is substantially such as shown in United StatesPatent No. 789472 granted May 9, 1905 to Wood & Northrop.

Predetermined exhaustion of the filling in the running shuttle causesthe feeler to oper ate in such manner that the transmitter 6 will betilted, lifting its inner end 7 temporarily, and thereby bringing therear end of a latch S into the path of a hunter 9 in practice mounted onthe left-hand vibrating actuator or weft-hammer 10. This latch ispivotally connected at its forward end with an upturned arm 11 fast on acontrolling rockshaft 12 which when turned in the direction of arrow 13Fig. 2, effects the operation of the replenishing mechanism, as providedfor in the Northrop type of loom referred to herein before.

As shown in Fig. 1 the loom is provided with a suitable shipper 14 andis held in. running position by the usual notched holdingplate 15,shipper release being effected by movement of the knock-off lever 16fulcrumed at 17 and having its inner end provided with a shelf 18, Figs.2, 3 and 4.

The replenishing mechanism is controlled as to its operation solely byangular movement of the rock-shaft 1.2, and herein this movement iseffected only by or through the I feeler mechanism, neither of thefillingde tectors or forks having any operative connection with orcontrol over said rock-shaft, as will appear presently.

At the left-hand or shipper side of the loom the filling detector orfork 19 is located, mounted on its slide 20 su ported in the fixed guideor stand 21, the tai l 22 of the fork cooperating in usual manner withthe hook 23 of the weft-hammer 10 when filling absence is detected bysuch fork.

The front end of the slide is extended at 24 beneath the laterallyturned head 25 of an upturned arm 26 fast on a sleeve 27 herein shown asconcentric with the rock-shaft 12 but angularly movable independentlythereof, a lug 28 on the extension 24 rising in front of the head 25.

At the right-hand or replenishing side of the loom a secondfilling-detector or fork 29 is located, mounted on a slide 30 movable inits stand 31 and 006 erating at its front end with the head 32 o an arm33 also fast on the sleeve 27, the fork-tail 34 cooperating with thehook 35 of the adjacent weft-hammer 36, Fig. 1, when said fork detectsfilling absence.

For convenience in reference the left-hand fork may be designated as themain fork or detector and the other one as the auxiliary detector orfork, the main fork detecting on the pick of the shuttle to the left,Fig. 1., and the auxiliary fork detecting on the pick of the shuttle tothe right, as is usual in double detector looms.

In the broad features of construction and operation so far described theapparatus is similar to that shown in United btates Patent N 0. 763441granted to Stimpson June 28, 1904 and herein the take-up is arrestedwhenever either detector detects filling absence and turns the tubularshaft or sleeve 27, substantially as in the Stimpson patent. This isaccomplished by means of an arm 37, Fig. 2, fast on the sleeve andhaving a lateral lug 38 extended under the pawl-carrier 39 of thetake-up mechanism, (not shown) so that when the arm 37 is elevated thepaw -carrier 39 will be lifted to disengage the take-up pawl from itsratchet in take-up mechanism such for instance as I the slide 20.

is shown in United States Patent No. 643284.

I will now describe the means whereby detection of filling absence byeither detector will effect loom stoppage with the shed open in whichfilling absence is initially detected, so tlhat matching the pick byhand is obviater.

The fork-slide 20 has its sides upturned to form vertical shoulders 40connected by a bar 41, and near its forward end the two sides of theslide are provided with opposite notches 42, 43, the former being thedeeper, arranged to cooperate with a laterally extended detent 44, Fig.1, of a controller 45, made as an elongated casting inserted between thesides of the slide and provided at its forward end with a finger-piece46. A dog 47 is formed on the end ofthe cross-bar constituting thedetent 44, the latter resting in the notches 42 or 43 according tocircumstances, and normally the detent is held in the shallower notches43 so that the dog 47 is elevated above the shelf 18 on the knockofflever, as in Fig. 2. The controller has lateral ears 48 back of thedetent, to rest upon the fork slide when the dog 47 is in position toengage the knock-ofi lever, as in Fig. 4, directly in front of theshoulders 40.

As shown in Figs. 2, 3 and 4 the rear end of the controller extendsunder the stop-bar 41 and between it and the top of an abutment 49forming a part of the stand 2]., a shoulder 50 on the controller attimes cooperating with the abutment while a pin 51 on the controllerlimits forward movement of the controller by cooperating with thestopbar 41. A- light leaf-spring 52 is secured to the latter and isextended forward to hear at its free end 11 on the controller andprevent the same rom jumping out of place accidentally, the s ringserving to yieldingly retain the control er in one or the other of itspositions.

Taking the normal position of the various parts of the detectingmechanisms, as in Fig. 1, and of the left-hand one of such mechanisms asin Fig. 2, if the slide 20 is moved forward or outward, it will carrywith it the controller until its shoulder 50 engages the abutment 49,arresting the movement of said controller while the slide completes itsforward movement, to the right 'viewing Fig. 2. As a result the detents44 are moved out of the shallow notches 43 and drop into the deepnotches 42, see Fig. 3, and the dog 47 will drop down into the positiontherein shown, but with its end forward of the shelf 18 on the knock-offlever. The slide now moves back, carrying the controller with it, to theposition shown in Fig. 4, and it will be seen that the dog 47 is nowback of the shelf 18 and in position to engage the same on the nextoutward movement of It will also appear that when the controller ischanged from inoperative position, Fig. 2, to that shown in Figs. 3 andi, the lateral cars 48 are then just in front of the shoulders 40 on theslide so that as the latter moves forward the second time the shoulderwill engage the ears 48 and will act through the controller 45 and dog47 to swing the knock-off lever 16 and release the shipper. Thus it willappear that two successive forward movements of the main slide 20 arerequired to effect the operation of the shipper-releasing member 16,whether the initial forward movement of the slide be effected by orthrough detection of filling absence by the detector or fork l9,otherwise, as will be explained. Supposing that filling absence isdetected by the fork 19 on the flight of the shuttle to the left, Figs.1 and 5, then on that pick the actuator moves forward and throughcooperation of its hook with the fork-tail 22 the slide is moved forwardeffecting a change in the position of the controller 45 from that shownin Fig. 2 to that shown in Fig. 3, and the tubular shaft 27 is turned toarrest take-up. The shuttle is now picked to the right, on the secondpick, the fork 29 detecting filling absence, and its slide 30 is movedforward by the adjacent actuator 36, Fig. 1, to swing forward the arm 33and turn the shaft 27 a second time, again arresting take-up. It will beunderstood that as the slide 30 is moving forward the slide 20 will bemoving back, but after the dog 47 has been moved back behind the shelf18 the turning of the shaft 27 just referred to will swing forward thearm 26, and its head engages the lug 2S and effects the second forwardmovement of the slide 20. This second movement of the slide 20 w ill notin practice operate the knock-off lever 16 to actually release theshipper until the shuttle is starting on the third pick, or to the left,Fig. 5, and the loom turns over far enough by its momentum, aftershipper release, to throw the shuttle to the right on the fourth pick,the loom then coming to a stop with the shed open. A cycle of threepicks is thus accomplished, and the loom comes to rest with the shedopen on the fourth pick, which is the first pick of the succeedingcycle, and hence is the same pick as that in which filling absence wasfirst detected, as will be seen from an in spection of Fig. 5. In others ords the loom stops with the same shed open as the one in whichfilling absence was first detected, so that the ii'eaver removes thepartial pick of filling, properly positions the shuttle in theright-hand shuttle-box, if necessary, and starts the loom, usuallyresetting the controller 45 by grasping the finger-piece 46 and pullingthe controller forward into the position shown in Fig. 2, with thedetents 44 in the shallow notches 43.

The second case will now be considered,

the break of filling being detected initially by fork 29, on the flightof the ssh .ttle to the right. The slide is moved forward, rocking shaft27 and acting through arm 26 and lug to simultaneously move forward themain slide 20, to change the relative position of the controller fromthat shown in Fig. 2 to that shown in Fig. 3, and take-up is alsoarrested. The shuttle is now picked to the left, both slides moving backunder the influence of usual retracting springs, indicated at 53 and.54, Fig. l, and as the actuator 10 moves forward jrst before the thirdpick (with the shuttle moving to the right) the hook 23 will cooperatewith the fork-tail 22 and will effect a seconr. successive forwardmovement of the slide 20, but not till after the dog 41 is behind theshelf 18, so that shipper release is actually effected after the shuttlehas started on the third pick. As before explained the momentum of theloom will then trarn it over far enough for the shirttle to be picked tothe left, on the fourth pick, before the loom comes to a stop, with thesame shed open as the one in which the absence of filling was firstdetected. The sec ond forward movement of the slide 20 brings itsshouldered end 55 against the head 25 of the arm 26, and through thelatter the shaft 27 is rocked to arrest take-up. The fourth or finalpick of the series is the first pick of the cycle of three picks, hencethe loom stops with. the proper shed open and the shuttle at theleft-hand side of the loom, so that when the faulty pick of filling isremoved and the shuttle is properly boxed the loom is ready to bestarted.

Neither of the detectors has any control over the replenishingmechanism, as will be obvious, that mechanism being controller solely bythe feeler device.

Take-up will be arrested on the third and fourth pick in both of thecases illustrated diagrammatically in 5 and 6, for there is no fillingpresent in either of said picks one detecting mechanism will act on eachpick to effect SSCl'l arrest, preventing the formation of a thin placein the cloth.

Three harnesses are indicated at 56, 57,

and 58, Fig. 1, to form the threc-shed cycle for which the apparatusherein described is arranged, the shedding devices in themselves formingno part of my invention and being of any desired. character to performthe work.

l fhen the filling breaks the operation is such that two picks areallowed for detection of filling absence, one for the operation of theshipper releasing means, and one for the momentum of the loom to act,whether the break occurs on the flight of the shuttle to the right, orto the left.

The mechanism is simple and efficient, and a very complete control ofthe operation of the loom is attained, while the time of the weaver issaved as the proper shed is open when the loom stops, requiring noturning over of the loom by hand to match the pick.

'Ihere are two changes in the operation of the loom, viz:fillingreplenishment and loom stoppage, both changes being effectedautomatically, but if the filling breaks the change will always bestoppage without replenishment, irrespective of which detector firstdetects filling absence.

While initial detecting action of either detector is always followed byloom stoppage there is a predetermined delay or retardation in therelease of the shipper after the absence of filling has been detected.initially, in order that the cycle may be completed and the loom finallystopped on the corresponding pick of the succeeding cycle.

I-Iaving fully described my invention, what I claim as new and desire tosecure by Letters Patent is 1. In a loom provided with mechanism toeffect automatically replenishment of the running filling only prior tocomplete exhaustion thereof, two filling-detectors located at oppositesides of the loom, a shipper, and means operated by initial detection offilling absence by either detector to effect shipper release apredetermined number of picks after such detection. and stop the loom onthe same pick of the cycle as that in which initial detection occurred.

2. In a loom provided with mechanism to effect automaticallyreplenishment of the running filling only prior to complete exhaustionthereof, two filling-detectors located at opposite sides of the loom, ashipper, a re leasing device therefor, and means operated by initialdetection of filling absence by either detector to actuate said deviceand effect shipper release always at least two picks after suchdetection.

In a loom provided with mechanism to effect automatically replenishmentof the run ning filling only prior to complete exhaustion thereof, twofilling-detectors located at op posite sides of the loom, a shipper, andmeans operative to effect shipper release only after initial detectionof filling absence by either of said detectors and detecting action ofthe other detector on the next pick.

4. In a loom provided with mechanism to effect automaticallyreplenishment of the runnin filling only prior to complete exhaustionthereof, two filling-detectors located at opposite sides of the loom, ashipper, device adapted to temporarily arrest take-up by detectingaction of either detector, and means operative to effect shipper releaseonly after initial detection of filling absence by either detector anddetecting action of the other detector on the next pick.

5. In a loom, a shipper, a releasing device therefor, afilling-detecting instrumentality at each side of the loom, and meansoperated directly by one and indirectly by the other of saidinstrumentalities to actuate the re-' leasing device only after initialdetection of filling absence by either instrumentality and secondarydetection of filling absence by the other instrumentality.

6. In a loom, a shipper, a releasing device therefor, a filling-fork andits slide at each side of the loom, a dog movable with and alsorelatively to one of said slides, to cooperate with and actuate thereleasing device upon two successive outward movements of the adjacentslide, and means to effect outward movement of such slide by or throughoutward movement of the other slide when the corresponding fork detectsfilling absence.

7. In a loom, in combination, two fillingdetectors, means controlleddirectly by one of them and indirectly by the other one to effect loomstoppage when either detector initially detects filling absence, andmeans to delay such stoppage until the same shed is open as that inwhich filling absence was detected.

8. In a loom, in combination, two fillingdetectors, means controlleddirectly by one of them and indirectly by the other one to effect loomstoppage when either detector initially detects filling absence, meansto delay such stoppage until the same shed is open as that in whichfilling absence was detected, and a device adapted to arrest take-uptemporarily when detecting action occurs.

9. In a loom, main and auxiliary fillingforks, and their slides, atopposite sides of the loom, a shipper and a releasing device therefor, anormally inoperative member on the main slide to always operate thereleasing device upon a secondary outward movement of the slide, meanswhereby said member is rendered operative by a primary outward movementof the said slide, and means actuated by initial detection of fillingabsence by the auxiliary fork to effect a primary outward movement ofthe main slide, the secondary movement thereof being effected bydetection of filling absence by the main fork on the next pick.

10. In a loom, main and auxiliary fillingforks and their slides atopposite sides of the loom, means to effect outward movement of the mainslide by outward movement of the auxiliary slide when its fork detectsfilling absence, shipper, and a releasing device therefor, a controlleron the main slide having a dog to at times engage and operate thereleasing device, and means to operatively position said dog by aprimary outward movement of the main slide and to bring said dog intoactuating engagement with the shipper-releasing device by a secondary0ut ward movement of said slide, such primary movement being effected byinitial detection of fillingabsence by either fork and the secondarymovement upon detecting action of the other fork on the next pick,whereby shipper release is retarded for two picks in either case.

11. In a loom having automatic mechanism to replenish filling only priorto complete exhaustion of the running filling, means, including twofilling-detectors and a retarding instrumentality, to effect stoppage ofthe loom with the same shed open as that in which filling absence wasdetected initially by one of the detectors.

12. In a loom having automatic filling-replenishing mechanism, means,including two filling-detectors and a retarding instrumentality, toeffect stoppage of the loom with the shed open on the third pick afterthe pick on which filling absence was detected initially by either oneof the detectors.

13. In a loom having mechanism to effect automatically replenishment ofthe running filling, only prior to complete exhaustion thereof, means toeffect stoppage of the loom, a filling-detector to effect the operationof said means a predetermined number of picks after initial detection offilling absence by such detector, a second filling-detector to effectthe operation of said means the same number of picks after said seconddetector initially detects filling absence, and a device to effectarrest of a take-up instrumentality upon detecting action of eitherdetector.

14. In a loom, two filling-forks and their slides, at opposite sides ofthe looln, a controller carried by one of the slides and having a dog, ashipper and a releasing member therefor actuated by the dog only by thesecond. of two successive outward movements of the slide on which thecontroller is carried, and means operating, after initial detection offilling absence by the fork upon whose slide the controller is carried,to give said slide a second. outward movement when the filling absenceis detected by the other fork.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

ROBERT JAMIESON.

l'l itnesses ALBERT JV. EDWARDS, EDWARD DANA Oseoon.

